She said: "Madonna is everything to me, and that movie is amazing, because it caught her at a time when she was a bit more vulnerable. I wanted to do that too, to capture a snapshot of who I am now so that I can remind myself what I've lost if I ever do become totally jaded."

"There was a time when I was going to be involved in The Help. Just a small part, I wasn't going to be Emma Stone or anything, but I couldn't because the shooting schedule conflicted with the release of my record.

"I was upset about that. I knew it was going to be an important film. Not that I need to do drama first, but I do want to do something that makes a strong impression."